Welding device and method for titanium alloy sheets

Abstract

The invention provides a welding device for titanium alloy sheets. Key pressing plates are arranged at the two ends of an assembling bottom plate respectively, the assembling bottom plate and the key pressing plates are combined to form a workpiece clamping mechanism, and a back cushion plate is detachably arranged on the assembling bottom plate. A U-shaped groove is formed in the center of the upper surface of the back cushion plate, and an air inlet pipe opening is formed in the U-shaped groove. Two blocking lumps are movably arranged in the U-shaped groove and used for blocking argon in the U-shaped groove in the welding process so as to protect the back face of a weld joint. A welding gun nozzle is connected with a welding gun through a separation sleeve. The front end of a tail protecting dragging cover is connected with the welding gun nozzle in a matched mode, and the welding gun is used for driving the tail protecting dragging cover to move together. Meanwhile, the invention provides a welding method of the welding device. The welding device is simple and reliable in structure, the welding method is good in stability, and the welding quality meets the batch production requirement.

Description

technical field [0001] The invention belongs to the technical field of mechanical manufacturing, and in particular relates to a welding device and a welding method for a titanium alloy thin plate. Background technique [0002] At present, titanium alloys are widely used in the fields of aerospace, aviation and national defense manufacturing, especially titanium alloy sheets, which are often used as welded structural parts, such as spacecraft cabins welded by TC4 titanium alloy sheets. [0003] At this stage, the main method of welding titanium alloys is still argon tungsten arc welding. The chemical properties of titanium alloys are extremely active at high temperatures, and they are easily oxidized at high temperatures. It is necessary to protect and control the oxidation process of titanium alloys during welding. The assembly is not suitable, and the thin-plate titanium alloy is easy to burn through or leak unevenly during the welding process. Therefore, how to assemble th...

AI Technical Summary

Problems solved by technology

The assembly is not suitable, and the thin-plate titanium alloy is easy to burn through or have uneven welding leakage during the welding process. Therefore, how to assemble the workpiece and how to realize the protection during the welding process is the key to ensure the welding of titanium alloy thin plates

Using the existing conventional welding method, it is easy to cause serious surface oxidation, and it is easy to produce porosity welding defects during the welding process, which seriously affects the welding quality of titanium alloy and cannot meet the requirements of the product.

[0004] Through the retrieval of prior art both at home and abroad, there is no description or report of similar technology to the present invention, and no similar data at home and abroad have been collected yet.

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